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Earnings Per Share - Additional Information (Detail) (Stock Compensation Plan [Member])
3 Months Ended 9 Months Ended
Sep. 28, 2013
Sep. 29, 2012
Sep. 28, 2013
Sep. 29, 2012
Stock Compensation Plan [Member]
       
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]        
Options to purchase common stock 0 0 0 395,524